methyl isocyanate reacts with strong acids, such as sulfuric acid, to form a cation. for protonation on , which resonance contributor is most important?

Answers

Answer 1

The resonance contributor that is most important for protonation in methyl isocyanate is the one in which the nitrogen atom is double-bonded to the carbon atom, and has a formal positive charge, this is called a carbocation or a carbenium ion.

This resonance contributor is considered the most important because it shows the nitrogen atom with the greatest electron density, making it more susceptible to protonation.

In the reaction of methyl isocyanate with strong acids, such as sulfuric acid, the protonation occurs on the nitrogen atom of the molecule. The protonation process is determined by the relative acidity of the nitrogen atom and its electron-withdrawing groups, and thus the resonance contributor that is most important for the protonation is the one that shows the nitrogen atom with the greatest electron density.

Learn more about Resonance here: https://brainly.com/question/29547999

#SPJ4


Related Questions

lithium reacts spontaneously with bromine to produce lithium bromide. if 25.0 g of lithum and 25.0 g of bromine are present at the beginning of the reaction how much of each substance are present when the reaction is complete

Answers

The balanced equation for the reaction of lithium and bromine to produce lithium bromide is:

Li + Br2 → LiBr

The total mass of the reactants and products must be equal in order for the rule of conservation of mass to apply. As a result, we can determine the mass of the other reactant and product if we know the mass of one reactant and one product.

In this instance, we are aware that the initial concentrations of the reactants are 25.0 g of lithium and 25.0 g of bromine. Lithium has a molar mass of 6.939 g/mol, while bromine has a molar mass of 159.808 g/mol. So that we may convert each substance's mass to a unit of moles:

Li: 25.0 g / 6.939 g/mol = 3.6 moles

Br2: 25.0 g / 159.808 g/mol = 0.156 moles

We can then convert the moles back to grams using the molar mass of each substance:

Li: 3.6 moles x 6.939 g/mol = 24.96 g

LiBr: 3.6 moles x (6.939 g/mol + 159.808 g/mol) = 627.38 g

Br2: 0.156 moles x 159.808 g/mol = 24.96 g

So, when the reaction is complete, we have 24.96 g of lithium, 24.96 g of bromine, and 627.38 g of lithium bromide.

To learn more about chemical reactions:

https://brainly.com/question/29470602

#SPJ4

Cyclopropane rearranges to form propene in the gas phase. The reaction is first order in cyclopropane and has a measured rate constant of k=3. 36×10^−5 s^−1 k=3. 36×10^−5 s^−1 at 720 K. If the initial cyclopropane concentration is 0. 0445 MM, what will the cyclopropane concentration be after 235. 0 min? Express the molarity to three significant figures

Answers

2.8×10−2 M will the cyclopropane concentration be after 235. 0 min.

The cycloalkane cyclopropane has the chemical formula (CH2)3, and it is made up of three methylene groups (CH2) that are joined together to create a ring. The structure experiences significant ring strain as a result of the ring's modest size.

[tex]k=3.36*{10^{-5}}{s^{-1}}\\\\K=\frac {2.303 }{t} log \frac{a}{a-x}\\\\3.36*{10^{-5}}=\frac {2.303 }{235min} log \frac{0.445}{a-x}\\\\\\3.36*{10^{-5}}=\frac {2.303 }{235*60} log \frac{0.445}{a-x}\\\\\\20.571*{10^{-2}}=log \frac{0.445}{a-x}\\\\\\1.58=\frac{0.445}{a-x}\\\\\\(a-x)=0.281\\\\(a-x)=2.8*{10^{-2}}M[/tex]

This meant that the quick and painless induction of anaesthesia using cyclopropane and oxygen was possible Ralph Waters, an American anaesthetist, developed cyclopropane and put it to use in medicine. To save this then-expensive substance, he devised a closed system with carbon dioxide absorption. With a blood/gas partition value of 0.55 and a minimum alveolar concentration of 17.5%, cyclopropane is a reasonably strong, non-irritating, and sweet-smelling substance. .8×10−2 M will the cyclopropane concentration be after 235. 0 min.

learn more about cyclopropane Refer:brainly.com/question/18521496

#SPJ4

33. A radioactive sample has an initial activity of 2.00 x 10^6cpm (counts per minute), and after 4.0 days, its activity is 9.0 x 10^5 cpm. What is its activity after 26 days?

A) 9.3 cpm

B) 1.1 x 10^4 cpm

C) 1.8 x 10^2 cpm

D) 2.8 x 10^-9 cpm

E) none of these


Please Show Work

Answers

The activity after 26 days can be calculated as 1.1 x 10^4 cpm.

What is radioactive?

Radioactive is a type of energy that is emitted from certain elements when they undergo radioactive decay. Radioactive elements, such as uranium and radium, contain unstable atoms that are in a constant state of decay. When these atoms break apart, they release energy in the form of radiation.

The decay constant (k) of the sample can be calculated as follows:
k = ln(2.00 x 10^6/9.0 x 10^5) / 4.0
k = 0.073
Therefore, the activity after 26 days can be calculated as follows:
A = 2.00 x 10^6 e^(-0.073 x 26)
A = 1.1 x 10^4 cpm

To learn more about radioactive
https://brainly.com/question/25750315
#SPJ1

A sample of brass released 2,690 J into some water. The initial and final temperature of the water are 21.0 °C and 42.0 °C, respectively. What is the mass of the water?​

Answers

The mass of the water can be obtained as 31 g.

What is the mass of the water?

I would want us to have the first law of thermodynamics at the back of our minds. I said this because the energy that have been lost by the brass is the energy that the water is going to have to gain and this is the first law of thermodynamics.

Thus we have;

H = mcdT

m = mass of the water

c = Specific heat capacity of water

dT = temperature change

Then we have;

2690 = m * 4.18 * (42 - 21)

m = 2690/4.18 * (42 - 21)

m = 31 g

Learn more about heat capacity:https://brainly.com/question/28302909

#SPJ1

Three magnesium isotopes have atomic masses and relative abundances of 23.995 amu (78.99%), 24.986 amu (10.00%), and 25.992 (11.01%). Calculate the average atomic mass of magnesium.

i’ll give brainliest

Answers

You would multiple the percentages times the atomic mass and then add each of them together.

Ex. (23.995)(.7899)+(24.986)(.10)+(25.992)(.1101). = 24.3139 amu

One mole of tungsten (6 × 1023 atoms) has a mass of 184 grams, and its density is 19. 3 grams per cubic centimeter, so the center-to-center distance between atoms is 2. 51 × 10-10 m. You have a long thin bar of tungsten, 2. 6 m long, with a square cross section, 0. 07 cm on a side. You hang the rod vertically and attach a 98 kg mass to the bottom, and you observe that the bar becomes 1. 42 cm longer. From these measurements, it is possible to determine the stiffness of one interatomic bond in tungsten. 1) What is the spring stiffness of the entire wire, considered as a single macroscopic (large scale), very stiff spring?

Answers

The wire is 91826.77 N/m stiff, One layer of a cross section contains 1.0158e13 atoms, Number of bonds per unit length = 9.96e9, rigidity = 9.035 e-9 N/m

a) The force acting on the bar is given by (F) = mg = 119 * 9.8 = 1166.2 N.

The wire's extension (L) is 1.27 cm, or 0.0127.

Therefore, stiffness of wire = F/L = 1166.2 / 0.0127.

The wire is 91826.77 N/m stiff.

b) The ratio of the number of atoms in one cross-sectional layer to 8e-4 (2.51e-10)2

One layer of a cross section contains 1.0158e13 atoms.

c) The length's bond count is 2.5 / 2.51e-10.

Number of bonds per unit length = 9.96e9

d) Bond stiffness equals force acting on the bond / bond strain

bond-applied force = 1.152e-20 N

strain is equal to (0.0127/2.5)*2.51e-10 = 1.275e-12 m.

Stiffness is calculated as 1.152e-20 / 1.275e-12.

rigidity = 9.035 e-9 N/m

Learn more about atoms here:

https://brainly.com/question/13654549

#SPJ4

How many grams of oxygen are in 125 grams of FeCO3?

Answers

Answer:

In 125 grams of feCO3  287.30 g of FeCO3 oxygen is produce

Explanation:

The Balance Chemical Equation is as follow,

                           FeCl₂ + Na₂CO₃    →    FeCO₃ + 2 NaCl

Calculate Mass of FeCl₂ as,

                           Molarity  =  Moles ÷ Volume

Solving for Moles,

                           Moles  =  Molarity × Volume

Putting Values,

                           Moles  =  2 mol.L⁻¹ × 1.24 L

                           Moles  =  2.48 mol

Also,

                            Moles  =  Mass ÷ M.Mass

Solving for Mass,

                           Mass  =  Moles × M.Mass

Putting Values,

                            Mass  =  2.48 mol × 126.75 g.mol⁻¹

                            Mass =  314.34 g of FeCl2

Calculate Mass of FeCO₃ formed as,

According to equation,

          126.75 g (1 mole) FeClZ produces  =  115.85 g (1 mole) FeCO₃

So,

               314.34 g of FeCl₂ will produce  =  X g of FeCO₃

Solving for X,

                    X =  (314.34 g × 115.85 g) ÷ 126.75 g

                     X =  287.30 g of FeCO₃

To learn more about FeCO3

https://brainly.com/question/11150327

https://brainly.com/question/11150327

HELP PLS I NEED ANSWER NOW PLS :[ Which substances are released during cellular respiration? Use complete sentences to explain how the mass of oxygen is conserved during cellular respiration.

Answers

Vvvvvgbuhhvhuhhgggbvgvv

A closed container is filled with oxygen. The pressure in the container is 355 kPa What is the pressure in

millimeters of mercury?

Answers

4852 is the pressure in millimeters of mercury

State how copper ulfate i different to copper ulfide in term of the element it contain

Answers

Copper sulphate has oxygen elements in it while copper sulphide doesn't have.

Copper sulphate is formed by the combination of copper and sulphate ions.The chemical formula of this compound is CuSO4.It is formed by the combination of copper, sulphur and oxygen elements.Copper sulphide is formed by the combination of copper and sulphide ions.The chemical formula for this compound is CuS.It is formed by the combination of atoms of copper, and sulphur.Hence, Copper sulphate has oxygen elements in it while copper sulphide doesn't have.

Go through the given link below to know more about copper:-

https://brainly.com/question/24856041

#SPJ4

which statement supports the main ideas of the law of conservation of mass? responses the reactants in a chemical reaction are the same as the products. the reactants in a chemical reaction are the same as the products. the masses of the reactants are less than the masses of the products. the masses of the reactants are less than the masses of the products. the masses of the reactants are equal to the masses of the products. the masses of the reactants are equal to the masses of the products. the masses of the reactants are greater than the masses of the products.

Answers

Answer:

the first statement is correct...

it only supports the main idea of the law of conservation of mass...

hope I can help you...

A tiny crystal of table salt (NaCl) contains 950. billion formula units of salt. What is the mass of this crystal, in grams? Chemical Formula: Work: Calculated answer: Molar mass: # sig figs: Final answer with units:​

Answers

Answer:

29 ouns

Explanation:

it has 950 billion so it will be scaled in grams not kilograms

consider the energy diagram for a solution formed between molecules a and b. what can be said about this solution?

Answers

The energy diagram for a solution formed between molecules A and B indicates that the solution is energetically favorable.

This means that when A and B are mixed together, the total energy of the system is lower than if they were kept separate.

This is due to the molecules forming strong intermolecular forces, such as hydrogen bonds, that make the solution more stable. Additionally, this type of solution can be described as being “miscible”, meaning that the two molecules are able to mix together to form a homogenous solution.

Learn more about the energy diagram:

https://brainly.com/question/3761501

#SPJ4

A 55-kg woman has 7. 5 × 10−3 mol of hemoglobin (molar mass = 64,456 g/mol) in her blood. How many hemoglobin molecules is this? What is this quantity in grams?

Answers

The number of hemoglobin molecules can be calculated by multiplying the number of moles of hemoglobin by Avogadro's number (N_A), which is the number of entities (such as atoms or molecules) in one mole of a substance.

So, the number of hemoglobin molecules in the woman's blood is:

7.5 × 10^-3 mol * 6.02 x 10^23 molecules/mol = 45.15 x 10^20 molecules

To convert the number of moles of hemoglobin to grams, we can multiply the number of moles by the molar mass of hemoglobin:

7.5 × 10^-3 mol * 64,456 g/mol = 483.17 g

So, the woman has approximately 483.17 grams of hemoglobin in her blood.

Learn more about hemoglobin here:

brainly.com/question/15011428

#SPJ4

What element's don't have oxidation numbers?

Alkaline earth metals

noble gases

alkali metals

halogens

Answers

Noble gases does not have any oxidation number. And elements in pure form does not have any oxidation numbers.

Elements in their pure form, such as gold (Au), do not have oxidation numbers because they are not chemically bonded to any other elements. Some other examples of elements that do not have oxidation numbers include carbon (C) in a diamond, and hydrogen (H) in molecular hydrogen (H2).

Learn more about oxidation numbers here:

https://brainly.com/question/3035498

#SPJ4

What number of ATP is produced when a molecule of glucose undergoes fermentation?
A. 4
B. 36
C. 2
D. 38

Answers

C. 2 ATP.  At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up.

the structure of ATP, which is a nucleoside triphosphate. An organic substance called adenosine triphosphate provides energy for a variety of biological functions in living cells, including muscular contraction, nerve impulse transmission, condensate dissolving, and chemical synthesis. The main molecule for storing and transmitting energy in cells is adenosine 5'-triphosphate (ATP). At the cellular level, energy is used and stored as adenosine triphosphate (ATP). Adenine, ribose, and three serially bound phosphate groups make up. It is frequently referred to as the cell's energy currency and is like the money that is kept in a bank.provides energy for a variety of biological functions in living cells, including muscular contraction, nerve impulse transmission,

learn more about ATP  here:

https://brainly.com/question/14637256

#SPJ4

A puddle of liquid ammonia is evaporating. What mass of the ammonia evaporates as it absorbs 8. 2 kilo joules of energy? Pls help

Answers

24g of mass of the ammonia evaporates as it absorbs 8. 2 kilo joules of energy.

q = m .ΔHf

[tex]8.2KJ=m(399)\frac{J}{g}\\\frac {8.2*10^{3} J}{339\frac{J}{g}}=m\\0.024*10^{3}g=m\\24g=m[/tex]

With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical. Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colourless gas with a strong, pungent odour.When molecules on a liquid's surface escape into the vapour phase, evaporation takes place. When clusters of liquid molecules erupt into vapour bubbles, boiling happens within the liquid's bulk rather than at its surface. Below, at, and above their boiling points, all liquids will evaporate.It contributes considerably to the nutritional demands of terrestrial creatures by serving as a precursor to 45% of the world's food and fertilisers. Biologically, it is a frequent nitrogenous waste, especially among aquatic animals.

learn more about ammonia Refer:brainly.com/question/15409518

#SPJ4

what 3 molecules are made from the process of cellular respiration?

Answers

Answer:

Hydrogen (H20), Carbon Dioxide (CO2), ATP

What is the molar mass of Cu2CO3? You may round your answer to the nearest hundredth. Be sure to place the correct units on the end

Answers

Molar mass of Cu2CO3 is 187.05 g/mol

Molar mass M is the product of the mass of a chemical compound and the molecular weight of the substance. MB = m/nB, where m is the total mass of a sample of a pure material and nB is the molecular weight of substance B, is the formula for it. Pure substance is covered under the definition. Any material has a molecular weight of 6.023 x 1023. (Avagadro number). It can be used to quantify the results of a chemical reaction. Mol is used to indicate the unit.

= 63.5*2+12.01+16*3

= 187.05

so the molar mass of Cu2Co3 is 187.05

Learn more about molar mass here:

https://brainly.com/question/12127540

#SPJ4

HELP PLEASE BOND ENTHALPY WORKSHEET

Answers

Yes your answers are correct

what is the age of a sample of charcoal in which 90% of the carbon-14 that was originally present has decayed? assume the half-life of carbon-14 isotope is 5700 years

Answers

The age of a sample of charcoal in which 90% of the carbon-14 that was originally present has decayed is about 18,935 years.

A = A₀ (1/2)ᵗ/ᵏ (1) Half-life formula.

0.1A₀ = A₀ (1/2)ᵗ/⁵⁷⁰⁰ (2)Substitute A=0.1A₀ and k=5700

0.1 = (1/2)ᵗ/⁵⁷⁰⁰ (3)Divide both sides by A₀.

log₁/₂0.1 = t/5700 (4)Convert to log from using x=bʸ - logbx = y

5700log₁/₂0.1 = t (5)Multiply both sides by 5700.

18,935 = t

Use the half-life formula A = A₀(1/2)ᵗ/ᵏ where A is the initial amount, t is the number of years, and k is the half-life of the substance. It is given that 90% has decayed which means 10% remains so let A = 0.1A₀. Carbon-14 has a half-life of 5700 years so let k=5700. Substitute these values into the formula and solved for t to get 18,935 years as its value.

To learn more about the half-life of carbon visit here:

https://brainly.com/question/25783920

#SPJ4

which is the correct molar mass for the compound cabr2?

Answers

199.86 0r 200g/mol molar mass for the compound cabr2

The orbitals or shells that enclose an atom's nucleus are home to electrons. In the nucleus, protons and neutrons are present. In the atom's nucleus, they coalesce. An atom's nucleus is surrounded by electrons in distinct orbits. The molar mass is calculated by dividing the mass (g) of a certain chemical element or chemical compound by the amount of the substance (mol). The standard atomic masses (in g/mol) of the component atoms can be added to determine the molar mass of a compound.

Thus, the molar mass of CaBr2 can be calculated as shown below.

Molar mass=(1×40.078gmol+(2×79.904gmol)

=40.078gmol+159.808gmol

=199.886gmol

Hence, the molar mass of CaBr2 is 199.886gmol.

Learn more about molar mass here:

https://brainly.com/question/22997914

#SPJ4

What do you notice about all of the ionic charges for group 12 group 2 group 15 group 16 group 17

Answers

Answer: The elements in Groups 2,15,16 and 17 of the Periodic Table are called alkali metals. They form ionic compounds when they react with non-metals. Their ions have a single positive charge. For example, sodium forms sodium ions, Na+

Explanation:

hope you understood

The percentage of oxygen in air is 21%.

The mass of air in a classroom was 220Kg

Calculate the mass of oxygen in the classroom

Answers

The mass of oxygen in the room would be 46.2 kg.

The mass of a component as a percentage of the mass of the substance itself is known as the percent composition. Mathematically, this is expressed as:

Mass of component/mass of material multiplied by 100% gives the percent composition.

The percentage of oxygen in the air in this instance is represented as 21%, while the total mass of air in the classroom is provided as 220 kg. This formula can be used to determine how much oxygen is present in the classroom:

% oxygen composition = mass of oxygen/mass of air

Making the oxygen mass the focus of the formula:

Mass of air x percent oxygen content equals mass of oxygen

Let's replace the values now:

Weight of oxygen = 21% times 220

= 0.21 x 220

= 46.2 kg

Learn more about oxygen here:

https://brainly.com/question/13370320

#SPJ4

when alkaline earth metal reaects with iodine it makes a white solid. what characteristics of the solid

Answers

The white solid formed when an alkaline earth metal reacts with iodine is an ionic compound.

The white solid formed when an alkaline earth metal reacts with iodine is an ionic compound. This compound is composed of polyatomic anions and cations in an ionic lattice, which gives it its solid form. The cations come from the alkaline earth metals, which are group two elements on the periodic table, and the anions come from the iodine, which is a halogen. The compound is typically composed of a ratio of 1:1 or 2:1, depending on the metals in reaction. The compound is usually insoluble in water and can be used in various applications. It is often used for its chemical inertness, which makes it ideal for processes that involve corrosive or reactive materials.

To know more about alkaline earth metals click below:

https://brainly.com/question/12835232#

#SPJ4

water is added to a 8.23 g sample of tacl5. the only products are 5.71g of a solid containing only tantalum, chlorine and oxygen and 3.35 g of a gas which is 97.2% chlorine and the remainder is hydrogen. (a) determine the empirical formula of the gas. (b) what fraction of the chlorine of the original compound is in the solid? (c) determine the empirical formula for the solid produced. (d) write a balanced equation for the reaction between tantalum pentachloride and water

Answers

The empirical formula is the simplest formula for a compound which is defined as the ratio of subscripts of smallest possible whole number of the elements present in the formula. It is also known as the simplest formula.

write a balanced equation for the reaction between tantalum pentachloride and water?

Tantalum Pentachloride is used as the chlorinating agent of the organic compound, chemical intermediates, and preparation as tantalum.TaCl5 is used in the preparation of catalyst for the polycyclotrimerizations of alkenediynes, chloro-aryloxide compounds and for the plasma-enhanced atomic layer deposition of tantalum nitride films. This product is involved in the preparation of tantalum(V) oxychloride.Tantalum oxide (Ta2O5) is one of the most important transition metal oxides because of its extraordinary physical and chemical properties, including high dielectric and refractive coefficients and excellent photoelectric performance.

To learn more about chlorine  refers to:

https://brainly.com/question/29794366

#SPJ4

A sample of hydrogen has a volume of 12 L under a pressure of 3 atm. What will the pressure of this gas be if the volume were decreased to 6 L?

Answers

The pressure of the gas if the volume were decreased to 6L is 6 atm.

How to calculate pressure?

Boyle's law of ideal gases states that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.

The Boyle's law equation is given as follows;

P₁V₁ = P₂V₂

Where;

P₁ = initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume

3 × 12 = 6 × P

36 = 6P

P = 6atm

Therefore, the pressure of the hydrogen gas is 6 atm.

Learn more about pressure at: https://brainly.com/question/1437490

#SPJ1

a 5.250 mg sample of nicotine, composed entirely of c, h, and n, is combusted, producing 14.242 mg of co2 and 4.083 mg of h2o. what is the empirical formula of nicotine?

Answers

The empirical formula of nicotine is C0.96H1N1

The empirical formula of a compound is the simplest whole-number ratio of the atoms in the compound.

To find the empirical formula of nicotine, you need to determine the number of moles of each element present in the sample and then divide by the lowest number of moles.

First, you need to convert the mass of nicotine, CO2, and H2O to moles. To do this, you can use the molar mass of each element:

C = 12.01 g/mol

H = 1.01 g/mol

N = 14.01 g/mol

O = 16.00 g/mol

5.250 mg of nicotine is equal to:

[tex]\frac{ 5.250 mg}{(12.01+1.01+14.01)g/mol}[/tex])   = 0.0027 moles

14.242 mg of CO2 is equal to:

[tex]\frac{14.242mg}{(12.01+16.00*2)g/mol}[/tex]     = 0.0024 moles

4.083 mg of H2O is equal to:

 [tex]\frac{4.083mg}{(1.01*2+16.00)g/mol}[/tex]       = 0.0013 moles

Now you need to find the number of moles of each element present in the sample:

C = 0.0027 moles × 1

H = 0.0013 moles × 2

N = 0.0027 moles × 1

And finally, you can divide these values by the lowest number of moles to get the simplest whole-number ratio:

C =    [tex]\frac{ 0.0027 moles}{0.0027 moles}[/tex]      = 1

H =    [tex]\frac{0.0026 moles}{ 0.0027 moles}[/tex]      = 0.96

N =    [tex]\frac{ 0.0027 moles}{0.0027 moles}[/tex]      = 1

The empirical formula of nicotine is C0.96H1N1

It's important to note that the empirical formula represents the simplest ratio of atoms in a molecule but doesn't necessarily represent the actual molecular formula which could have more atoms or a different arrangement of atoms.

To know more about Nicotine,

https://brainly.com/question/934412

#SPJ4

what would happen to the percent yield of product if a student had not heated the test tube for as long as the directions instructed? explain.

Answers

The percent yield of product if a student had not heated the test tube for as long as the directions instructed is the result of the product will not match even the percent yield of the product being tested can fail.

A test tube is a tool used to carry out biochemical tests and grow microbes. The media that can be put into the test tube are solid media and liquid media and for the test tube lid you can use cotton, aluminum foil, metal caps, or plastic caps.

How to use a test tube can be heated into a beaker that has been filled with water and heated with a spirit burner for the heating process. Heating the test tube is important for laboratory tests such as purification of solvents by distillation and chemical reactions. One function of heating the solution is to increase the solubility of the solute in it. If a student does not heat the test tube according to the instructions given, the results of the product being tested will not be maximized. Even trials regarding the product fail with a high percentage.

Learn more about biochemical tests at:

https://brainly.com/question/29751259

#SPJ4

How does sunscreen work?(1 point) Responses .
It helps prevent the skin from absorbing UV waves.
It helps UV waves be able to pass through the skin
It helps UV waves be able to pass through the air.
It helps prevent the skin from reflecting UV waves.

Answers

Inorganic chemicals in sunscreen can reflect or scatter the light away from the skin, and organic (carbon-based) ones can absorb UV rays

Answer:

It helps prevent the skin from absorbing UV waves.

Explanation:

Other Questions
an investor with a required return of 12 percent for very risky investments in common stock has analyzed three firms and must decide which, if any, to purchase. the information is as follows: firm a b c current earnings $ 2.30 $ 3.50 $ 7.30 current dividend $ 1.10 $ 3.20 $ 7.40 expected annual growth rate in 6 % 1 % -1 % dividends and earnings current market price $ 24 $ 32 $ 64 what is the maximum price that the investor should pay for each stock based on the dividend-growth model? round your answers to the nearest cent. stock a: $ stock b: $ stock c: $ if the investor does buy stock a, what is the implied percentage return? round your answer to two decimal places. % if the appropriate p/e ratio is 11, what is the maximum price the investor should pay for each stock? round your answers to the nearest cent. stock a: $ stock b: $ stock c: $ if the appropriate p/e ratio is 6, what is the maximum price the investor should pay for each stock? round your answers to the nearest cent. stock a: $ stock b: $ stock c: $ Define recruitment and affect recruitment Question 3 of 5Tina's height is 6 inches less than her brother's height. Her brother's height is unknown.Which expression shows Tina's height? Use for her brother's height.O A. x-6O B. * C. 6x D. x+6 Multiply mentally 70 100 400 = (Type a whole number) In order to produce my movie, I need to shoot a scene for a high-speed chase and I need to shoot a scene for a bank robbery. The film production crew will be putting the movie together. I have the stunt crew for the chase scene from 10 am to 11 am and I have the stunt crew for the robbery from 6pm to 7 pm. Will the order I shoot the scenes in matter? What mathematical property did you use to answer this question? which of the following were characteristics of italian society and culture during the renaissance? check all that apply. reconciling old philosophies with christian thought wealth from trade continuous economic recessions clergymen largely seen as without fault The average pencil has 5,425 pencil shavings. How many pencils are found in 76,450 pencil shavings? (v) (5-6i)+(3+4i) - (5-7) Convert the temperature of scalding water 54 into degrees Fahrenheit and kelvin Due in 30 min URGENT!!!Giving BRAINLIEST !!What do characters do ?How do characters react to events or others actions ?How do characters actions cause other events ?How are actions foreshadowed in early parts of the story ? Why is it important to learn phonological awareness skills?A-Phonological awareness is essential forsinging the alphabetB-Phonological awareness is essential to the development of literacy skillsC. Phonological awareness is essential for mastering letter knowledgeD-Phonological awareness is essential for passing kindergarten Place these events in their correct order:Click an item to highlight it. Use the plus sign to move the item up or the minus sign to move it down. Before Caiaphas Before Annas Before Pilate the second time Before Herod Before the Sanhedrin Before Pilate the first time an electric field line diagram is shown below. an electron is placed at point a. the electron is then removed and a proton is placed at point b. what is the direction of the electric force ? give angle relative to x with ccw as positive. what is the direction of the electric force ? what is true of the magnitude of the two forces? While his theory of evolution by natural selection applies to living things, Darwin was also a knowledgeable:mathematicianastronomerphysicistgeologist What is the median of this data set?{15, 14, 6, 10, 7, 15, 7, 8}Enter vour answer in the box Label the thoracic membranes and cavities big bend is found in what region of texas? group of answer choices the interior lowlands the basin and range province the gulf coastal plains the great plains What is your immediate reaction to Walter and Ruth's relationship? Why do you feel the way youdo? What was the government like in Uruguay for many years? peaceful just democratic unrest Exercise 2:Identify the missing terms:4a (-2a+4__+3)+ 2a(__a- 2a+_)= -2a*+12a+26aJE